Safe / Unsafe Native Methods - Visual Basic .NET

NickP

Hi there,

I am currently moving my API declarations into relevant classes for Safe
and Unsafe methods. My understanding is that unsafe methods are ones that
require elevated security priviledges in order to perform their function.
Is there a reference available as to what methods are safe and which unsafe?

For example I cam currently looking at the method SHGetFileInfo, I
presume this is unsafe as you would need to have priviledges in order to
view the information on specific files. Any advice on this would be greatly
appreciated.

Also, one other quick thing. Presumable <DllImport()> can be used for
*all* API declarations? I am making them all declared in a consistent way
and thought I'd best check that I'm not going to run into any weird
problems.

Cheers again and thanks in advance for any help!

Nick.

May 10 '06 #1

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3380

Mattias Sjögren

> I am currently moving my API declarations into relevant classes for Safe

and Unsafe methods. My understanding is that unsafe methods are ones that
require elevated security priviledges in order to perform their function.
Is there a reference available as to what methods are safe and which unsafe?

For example I cam currently looking at the method SHGetFileInfo, I
presume this is unsafe as you would need to have priviledges in order to
view the information on specific files. Any advice on this would be greatly
appreciated.
Do you use the SuppressUnmanag edCodeSecurity attribute? If not, it
doesn't really matter if you consider a function safe or unsafe, any
calling code will need permission to call unmanaged code (which
basically means it needs full trust).

Also, one other quick thing. Presumable <DllImport()> can be used for
*all* API declarations?

Yes
Mattias

--
Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

May 10 '06 #2

NickP

Hi Mattias,

Do you use the SuppressUnmanag edCodeSecurity attribute? If not, it
doesn't really matter if you consider a function safe or unsafe, any
calling code will need permission to call unmanaged code (which
basically means it needs full trust).
Yup.
Yes

Okay cool, I guess its just a matter of trial and error to see if the
attribute causes any issues than. Thanks for your help, much appreciated.

Nick.

May 12 '06 #3

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